Shockproof light fitting



Dec. 5, 1944. c. J. CORTNER 2,364,194

SHOCK-PROOF LIGHT FITTING Filed Jan. 20, 1943 62m J. CORTNER.

Patented Dec. 5, 1944 r UNITED STATES PATENT OFFICE SHOCKPROOF LIGHT FITTING Clyde J. Cortner, Long Beach, Calif.

Application January 20, 1943, Serial No. 472,956

2 Claims.

This invention relates to a novel shock-proof light fitting, useful wherever the light fitting might be subjected to violent shocks, such as aboard a warship, or elswhere in industrial plants wherever shock or violent vibrations might occur.

An object of my invention is to provide a novel shock-proof light fitting in which the light globe is mounted in an elastic body, theresilient body absorbing violent shocks or vibration.

Another object of my invention is to provide a novel shock-proof light fitting of the character stated in which the elastic mounting for the light globe is removably attached to the outlet box.

A feature of my invention resides in the novel means of mounting and gripping the light globe in an elastic disc so that the light globe is not injured by vibration or shock, and is so gripped by the mounting that a water-proof joint is provided preventing moisture from getting to the electrical contact members.

Still another object of my invention is to provide a novel shock-proof light fitting of the character stated which is simple in construction, effective in operation and inexpensive to manufacture.

Other objects, advantages, and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing Figure 1 is a side elevation of an outlet box embodying my invention.

Figure 2 is a transverse sectional view of the resilient disc in which the light globe is mounted and which is attachable to the outlet box, shown in Figure 1.-

Figure 3 is a half sectional view and half elevational view of a modified form of outlet box and resilient disc mounted thereon.

Referring more particularly to the drawing, the numeral l indicates an outlet box preferably formed of a metal and substantially circular in cross-section. A mounting bar 2 is attached to the top of the outlet box Land the usual screws or bolts extend through this bar for the purpose of mounting the outlet box in position. An outwardly flared flange 3 is formed on the lower end of the outlet box, and the purpose of this flange will be further described.

A disc 4 is formed of an elastic material such as rubber, plastic, or the like, which is formed with a recess 5 in the top thereof. The walls of this recess taper inwardly as shown at 6, and are adapted to fit against the tapered flange 3. The disc is sprung over the flange 3, this being possible due to its elastic nature, and then tightly grips the flange 3 and is effectively held in. operativeposition. A socket I is formed at the center of the disc 4, and this socket is preferably integral with the disc and is naturally formed of the same material. The usual contact elements are provided Within the socket I, including a threaded shell 8 into which the usual light globe screws, and a central contact 9 all of which is usual and well known. Electrical wires extend to the shell and to the central contact in the usual manner. 1

A spring I!) fits in an annular groove I l formed in the outer surface of the socket 1 and. serves to constrict the lower part of the socket tightly about the light globe. Thus a tight joint is provided around the light globe, and moisture is prevented from moving upwardly onto the contact elements. The usualarmored cable or conduit extends into the outlet box I through an opening provided through one of the flattened surfaces l2. The usual lock nut and rubber washer are used to seal the conduit with relation to the box.

In Figure 3 the outlet box 13 has an annular ring l4 threaded onto its lower end. The disc 15 is pinched between the ring [4 and the depending lips 16 of the outlet box. The socket I1 is identical in construction to the socket 1, previously described. It also includes the spring ring l8 which is identical to the ring ID. The ring l8 fits in an annular groove l9 which corresponds to the annular groove I II.

The operation of my shock-proof light fitting will be evident from the foregoing description.

Having. described my invention, I claim:

1. A shock-proof light fitting comprising an outlet box, an elastic disc, means releaseably mounting the elastic disc on the outlet box, a

socket on the elastic disc adapted and arranged to receive a light globe, and an ,expansible and contractable spring member fitting about the socket for constricting the lower part of the socket about a light globe mounted in the socket.

2. A shock-proof light fitting comprising an outlet box, a downwardly flaring flange about the lower end of the outlet box, an elastic disc having a recess in the upper face thereof, the walls of said recess being undercut to fit said flaring flange, a socket depending from the resilient disc and integrally formed therewith, said hub being adapted and arranged. to receive a light globe, and a spring ring encircling the socket adjacent the lower end thereof for constricting the socket about a light globe screwed into the socket.

CLYDE J. CORTN'ER. 

